BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
BEGIN:VTIMEZONE
TZID:America/Regina
BEGIN:STANDARD
DTSTART:19600424T030000
TZOFFSETFROM:-0700
TZOFFSETTO:-0600
TZNAME:CST
END:STANDARD
END:VTIMEZONE
END:VCALENDAR